Infection in a young immunocompetent male caused by Streptobacillus felis, a putative zoonotic microorganism transmitted by cats.

Rat bite fever (RBF) is predominantly caused by Streptobacillus moniliformis. We report a human infection with Streptobacillus felis. Clinical presentation was consistent with RBF, but serologic testing was negative for S. moniliformis. Eventually, S. felis specific sequences were detected in skin lesions of the patient and in the oropharynx of local cats.

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